package com.sdygmedia.action.kindeditor.servlet;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Random;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.json.simple.JSONObject;

public class ImageUploadServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public ImageUploadServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		String savePath = request.getSession().getServletContext().getRealPath(
				"/")
				+ "attached/";
		// �ļ�����Ŀ¼URL
		String saveUrl = request.getContextPath() + "/attached/";

		HashMap<String, String> extMap = new HashMap<String, String>();
		extMap.put("image", "gif,jpg,jpeg,png,bmp");
		extMap.put("flash", "swf,flv");
		extMap.put("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
		extMap.put("file", "doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2");

		// ����ļ���С
		long maxSize = 1000000;

		response.setContentType("text/html; charset=UTF-8");

		if (!ServletFileUpload.isMultipartContent(request)) {
			// out.println(getError("��ѡ���ļ���"));
			return;
		}

		// ���Ŀ¼
		File uploadDir = new File(savePath);
		if (!uploadDir.isDirectory()) {
			// out.println(getError("�ϴ�Ŀ¼�����ڡ�"));
			return;
		}
		// ���Ŀ¼дȨ��
		if (!uploadDir.canWrite()) {
			// out.println(getError("�ϴ�Ŀ¼û��дȨ�ޡ�"));
			return;
		}

		String dirName = request.getParameter("dir");
		if (dirName == null) {
			dirName = "image";
		}
		if (!extMap.containsKey(dirName)) {
			// out.println(getError("Ŀ¼����ȷ��"));
			return;
		}
		// �����ļ���
		savePath += dirName + "/";
		saveUrl += dirName + "/";
		File saveDirFile = new File(savePath);
		if (!saveDirFile.exists()) {
			saveDirFile.mkdirs();
		}

		SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
		String ymd = sdf.format(new Date());
		savePath += ymd + "/";
		saveUrl += ymd + "/";
		File dirFile = new File(savePath);
		if (!dirFile.exists()) {
			dirFile.mkdirs();
		}

		FileItemFactory factory = new DiskFileItemFactory();
		ServletFileUpload upload = new ServletFileUpload(factory);
		upload.setHeaderEncoding("UTF-8");
		List items = null;

		try {
			items = upload.parseRequest(request);
		} catch (FileUploadException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
		
		
		Iterator itr = items.iterator();
		while (itr.hasNext()) {
			FileItem item = (FileItem) itr.next();
			String fileName = item.getName();
			long fileSize = item.getSize();
			if (!item.isFormField()) {
				// ����ļ���С
				if (item.getSize() > maxSize) {
					// out.println(getError("�ϴ��ļ���С�������ơ�"));
					return;
				}
				// �����չ��
				String fileExt = fileName.substring(
						fileName.lastIndexOf(".") + 1).toLowerCase();
				if (!Arrays.<String> asList(extMap.get(dirName).split(","))
						.contains(fileExt)) {
					// out.println(getError("�ϴ��ļ���չ���ǲ��������չ��\nֻ����" +
					// extMap.get(dirName) + "��ʽ��"));
					return;
				}

				SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
				String newFileName = df.format(new Date()) + "_"
						+ new Random().nextInt(1000) + "." + fileExt;
				try {
					File uploadedFile = new File(savePath, newFileName);
					item.write(uploadedFile);
				} catch (Exception e) {
					// out.println(getError("�ϴ��ļ�ʧ�ܡ�"));
					return;
				}

				JSONObject obj = new JSONObject();
				obj.put("error", 0);
				obj.put("url", saveUrl + newFileName);
				PrintWriter out = response.getWriter();
				System.out.println(obj);
				System.out.println(obj.toJSONString());
				out.println(obj.toJSONString());
				
				request.setAttribute("msg", obj.toJSONString());
				
				request.getRequestDispatcher("jsp/show.jsp").forward(request, response);			}

		}

		/*
		 * response.setContentType("text/html"); PrintWriter out =
		 * response.getWriter(); out.println(
		 * "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
		 * out.println("<HTML>");
		 * out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
		 * out.println("  <BODY>"); out.print("    This is ");
		 * out.print(this.getClass()); out.println(", using the POST method");
		 * out.println("  </BODY>"); out.println("</HTML>"); out.flush();
		 * out.close();
		 */
	}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
